Electric furnace.



M. RUT BNBURG; ELECTRIC FURNACE. APPLICATION FILED mm 2.1909.

Patented Feb. 27', 1912.

2 SHEETS-SHEET 1' WITNESSES:

M. RUTHENBURG.

ELECTRIC FURNACE. APPLICATION FILED JUNE 2,1909.

Patented Feb.'27, 1912 2 SHEETS-SHEET 2.

w M MM? 2 M Z N I E N "x 1" 0 L. C x P I an t 5 V :2 M;

WITNESSES:

UNITED STATES PATENT orrion.

MARCUS RUTHENBURG, OF LONDON, ENGLAND.

ELECTRIC FURNACE.

I To all whom it may concern: I

Q Be it known that I, MARCUS Burrnnnnune,

of London, England,have invented a certa n" new and useful; Improvement in Electric Furnaces, whereof the following is a specifi-' cation, eference being had to the accompanying drawings. r

My improvementmay advantageously employed in a furnace .comprisinga stationary ca'sing ..having a removable hearth arranged to form a floor in said casing, and comprising a receptacle in which molten material may be iieceived and transported from said furnace.

My .improvement relates particularly to the arrangement of the electrodes whichare vertically adjustable in said furnace casing with respect to said removable hearth.

I found that the carbon electrodes which I employed without any protecting means in furnaces of the type above contemplated were burned away by the action of the hot gases rising from the arcs at the lower ends of the electrodes, and consequently, it was necessary to renew the electrodes much more refractory material extending between thebuch a lining jackets and the electrodes. may be conveniently made of fire clay or of a mixture of fire clay and asbestos, means being provided to retain the lining in stationary position with respect to the water jacket, permitting the electrodes to be vertically adjusted through the latter.

My invention comprisesthe various novel features of construction and arrangement hereinafter more definitely specified'and claimed.

In the drawings, Figure I, is a plan view of a furnace conveniently embodying my invention. Fig. ,II, is a vertical sectional view of said furnace taken on the line-II, II

in Fig. I. Fig. III, is a fragmentaryview sp fi at n ma ma. Patented Feb. 27, 1912. Application filed June 2, 1909; Serial Nof498,711. I i

partly in vertical section showing the con- =structionT and arrangement of one of the jackets indicated in Fig. II. Fig. IV is a fragmentary view similar .to Fig. III, but

showing amodified form of'jacket.

Referring to Fig. I, three vertical columns 1, conveniently formed of channel iron or 13, are pivoted in brackets 14, extending from said flange 11, and, being fitted in correspondingnotches in said flanges 11 and 7, are provided with nuts 15, resting upon said flange 7, to normally hold said hearth in the position shown in Fig. II. However, said hearth is provided with a'truck frame17,

and four supporting wheels 18, which reg:

steel, .c'onnested at their tops by girders 2,

ister with tracks 20, so that said hearth may i be raised and lowered, conveniently: by the vertical plunger 21, in ,the stationary easing 22,'-and may be progressed to and from said furnace to receive and discharge from the latter the molten material 23, produced by the operation of the furnace. Said hearth is conveniently provided with a clevis 24, by which it maybe tilted upon the axle 25, of the front wheels 18, when the latter are stopped by the abutments 27, formed by the upturned ends of the tracks 20. Said columns 1, are respectively provided with the brackets 28, having caps 29, adjustably and detach-ably connected therewith by bolts 30, and nuts 31, whereby the respective water jackets 32,'1nay be rigidly'secured in any desired position of vertica adjustment with respect to the furnace casing, although insulated from the latter by the linings 33 of said brackets. i

As shown in Fig. III, each wate'r jacket 32,.inc1udes respectively outer and inner metallic walls 35 and 36, connected by respectively upper and lower rings 37 and 38,

to which'theyare conveniently rivet'ed. and

water is intrpduced to the space betwe n said walls 35, and 36, through a pipe 40, extending to thi lowenportion of said space.

and in communication with the cold water supply main 41. The heated water is discharged from said jackets through the pipes 43, leading to the discharge main 45.

As shown in Fig. III, the lower ring 38, .of the jacket 32, is provided with the flange 48, which serves to retain the lining of insulatingmnd. preferably refractory material 49, which covers the inner wall 36, of the jacket 32', and insulates the latter from the cylindrical electrode 50.'- Said electrodes are referably formed of carbon fitted in meta lic'liolders 51, with which they are rigidly but detachably connected by any convenient means; for instance, by screw threads 52. Said holders 51, are rigidly but detachably connected, conveniently by the cotters 53, with the stems 54, by which said electrodes 50, may be lowered through the jackets 32, until consumed'as far as practicable. Said electrodes 50, are conveniently raised and lowered by the respective flexible connectors 56, which are attached to the pivoted insulating links 57 at the upper ends of said' stems 54.- Said connectors 56, extend over sheaves 60, suspended from the crossiframe 61, supported by said girders 2, andt the sheaves 62, at the tops of the respective columns 1, and are operatively connected to the respective winches 63, attached to the respective columns. It is to be understood that the arrangement above described is' such that said electrodes 50, may be vertically adjusted independently of each other by 'mani ulation of the respective winches 63, to which they are operat-ively connected as above described. Said electrodes 50, are operatively connected with a generator by leads 64 and 65.

Although I find that the flange 48, shown in Fig. III, affords an eflicient support for the insulating linin 49, without any other connecting or attaching means, it is to be understood that I do not desire to limit myself to such construction, as the lining may be connected with the water jacket in any convenient manner, or by any means permitting the necessary vertical adjustment of the electrode with respect to the lining.

' For instance, as shown in Fig. IV, the inner w -all 70, of the water jacket may be recessed orridged to engage the insulating lining 71, and retain the latter without any metallic flange at the lower end thereof.

I dq not desire to limit myself to the precise details of construction and'arrangementabove described, as various modifications may be made therein without departing three vertical columns; of means connecting 65 said columns in r-igid'relation; a cylindrical casing; brackets connecting the respective columns with said casing supporting the latter with a space beneath it; -a removable hearth forming a floor in said casing; means at the junction of said casing and hearth arranged to adjustably retain the latter'and comprising swing bolts pivotally connected with said hearth; means arranged to raise and lower said hearth, comprising a vertical rcciprocatory plunger; brackets extending from the respective columns overhanging said casing and provided with means adjustable to fit water jackets; water jackets adjustably fitted in connection with the respective overhanging brackets and includ ing linings fitted in the respective water jackets; electrodes tted to reciprocate through said linings and water jackets; means arranged to support said electrodes independently of said waterjackets, comprising flexible connectors; means arranged to raise and lower said electrodes including rotary drums in operative relation with said connectors; and, means arranged to support said drums upon the respective columns.

2. In a furnace, the combination with a stationary casing; of a cylindrical wat :r jacket depending within said casing; means supportin said water jacket in adjustable relation with said casing; an insulating lining fitted in said water jacket; and, an electrode arranged to reciprocate through said linin within said casing.

3. In an electric furnace, the combina tion with a stationary casing; of a vertical tubular water jacket depending within said casing; means arranged to support said jacket in rigid relation with said casing; an insulating lining in said water. jacket; an electrode arranged to reciprocate through said lining within said casing; and, means arran' d to reciprocate said electrode.

4. an electric furnace, the combination with a stationary casing; of a w=tcr I jacket; means supporting said jacket in rigid relation with said casing; a solid tubular insulating lining in said water jacket; an electrode extending through said lining in reciprocatory relation therewith; and, means whereby said electrode may be reciprocated through said lining without moving the latter.

5.-In an electric furnace, the combination with a stationary casing; of a tubular water jacket, having its inner wall ridged to engage an insulating lining; a tubular insulating lining engaged with the ridged wall of said jacket; and, an electrode fitted in said lining in longitudinally adjustable relation therewith.

6. In. an electric furnace, the combination with a casing; of a water jacket having a projecting member arranged to engage an insulating ining; a solid tubular nsulating lining fitted in said water, jacket and re-' taihed by aid projectin members; and,,an electrode fitted in said inin '7. In a furnac'ejlt-he combination with a stationary casing; of a water jacket depending 'ivithin said casing; meansjsupportmg sald Water jacket in adjustable relation casing;;of-means supporting saidv casing with a space beneath it; a removable heart forming afloor said casing; -a water 15 acket depending wit-hm saidcasmg; means supporting said water jacket in adjustable relation with said casing; an insulating lining fitted in said water jacket; and, an electrode arranged to reciprocate through said casing; of means supporting said casing with a space beneath it; a removable hearth formmg a floor in said easing; a water jacket depending within said casing; means supporting said water jacket in adjustable relation with said casing; and, an electrode arranged to reciprocate through said jacket within said casing.

In testimony whereof, I have hereunto signed my name at London, England, this 12 of May 1909.

MARCUS RUTHENBURG. Witnesses: Hnnnnrir I). Jamison,

F. L. RAND. w 

